Eyepiece



Aug. 17,1926. 1,596,162

A. B. DRGER EYEPIECE FiledFeb. 1o, 192s Patented Aeg. i7, 1926. 1,596,162 l UNITED STATES PATENT OFFICE.

ALEXANDER BERNHARD DRGER, OF LBECK, GERMANY.

EYEPIECE. l

. Application led February 10, 1926, Serial No. 87,251, and in Germany January 27, 1925. I

The' inventionA relates to eye pieces, and cord about it in the manner illustrated. vthe object of the invention is to provide an The inner face of the flange 3 forms a hold eyepiece which shall be especially adapted at its narrow part for the elastic hoop or for use in gas masks. .ring 7 for firmly holding the transparent f A further object is to provide an eyedisk-6 in contact with lens 1. 40

piece in which theplens is formed integral I claim with the frame which surrounds it, thus l. An eyepiece for gas masks comprising eliminating one joint and the danger of a lens, a protecting rim extending forwardleakage of gas therethrough. ly of said lens, and a rearwardly tapering W A'urther object is to provide an eyepiece frusto-conical flange ilared at its rear edge 45'- of non-brittle material which will not be to provide means for securing the body of easily broken,and which, when broken, may the mask thereto, said lens, rim and flange be readily replaced without special tools. being formedintegral.

A further object is to provide a protective An eyepiece for gas masks comprising l5 rim for the lens. a. lens, a. protective rim projecting `forward- The drawings illustrate an advantageous ly of said lens, a rearwardly tapering `frusconstruction of the invention. to-conical iange flared at its rearv edge to Fig. l is a front view of the invention provide means for securing the body of the as applied to a gas mask, and mask thereto, said flange, rim and lens be- 20 Fig. 2 a section throughone of the eyeing made of transparent material and being 55 pieces. formed integral with each 4other, and a The eyepiece is made of one piece of any transparent disk held against the rear face suitable transparent material (cellon, cellu.- of said'lens. lose, Celluloid and the like), the lens 1 be- 3. An eyepiece for gas masks .comprlslng ing formed by a plain disk. The disk a lens, a protective rim projecting forwardmerges into an annular bead or protective ly of said lens, a rearwardly tapering frusrim 2 projecting in front of the said disk, to-conical mounting ange, said fiange, rim and protecting it against injury. The proand lens being formed integral with each tective rim 2 merges intol the mountmg other, a transparent disk positioned agamst which, similar to the known. frames, made the rear face of said lens, and an elastic separate from the eye-piece, consists of a ring seated within said,lange and contactrusto conical iiange 3 having its inner edge in with said disk` to hold it in position. flared as at 4. The conical shape of the .gn testimony whereof I have' slgned my r flan e 3 allows the pliable material of the name to this specification. u 3" mas 5 to be connected thereto by winding ALEXANDER BERNHARD DRAGER 

